sharp lower left side pain

Tara • Prayers to everyone for healthy pregnancies and baby dust!
For the past two hours I have had repetitive, left side only, lower sharp pain. Like down in my pelivis is seems. I'm a FTM so not sure if this is something I should be freaking out about or not? I didn't think contraction would start that way so figured it's just baby pushing on pelivis a lot? Any advice?? I'm 36+5 weeks.